Cabinetmaker&#39;s clamp



April 16,-1929. c. l. YQUNG CABINET MAKERS CLAMP Filed May 17, 1927 iThis invention .relates to improvements in;

clamps of the general'class referred to asA y i .y

` gagement with the nut 17 a handwheelfZQ,

u Patented 1336, k17929.

TFE'S'LPT i oAnL 1. YOUNG, orvDENVERgeoLoRAno.

'f GABINETMAKERS CLAMP.

lj a Application filed. May 17',v

eabinetmakers clamps. y Y j j y. z 'Carpenters and ,cabinetmakersare''1re-y' quently called upon todo jobs. that'requ'ire the use of clampsyand several different kinds of clamps are manufactured and sold' forthis purpose.

It is theobject of thisinvention tofp'roduce a clamp that shall be ofVsimple and substantial construction and which-canbe uickly applied 'to`and removed 'ronrthey work. 1 j

The above Vand otherjobjects that -niaybe-v fcome apparentasf thedescriptionproceeds are attainedrby meansof arconstruetion and anarrangementot parts *thatV will herein after be described in detail andreference for this `purpose will now Abe had Vto the acco'mpanyingldrawing in 'whichy the preferred"l embodiment of kthe inventionlustratedand in which: y Y L Fig. 1` is a lplan View of the device; YFig. 2 is an enlarged longitudinalseetion `:taken on line 24,-2, Fig. 1;

Fig. 3 is a transverse section lhe improved clamp as illustrated on ythei drawing consists o'ftwo levers 8 and 9 .which are duplicates but arereversely arranged.

' by rivets 11. n at any convenient point between the ends ot V.Theselevers have been shown as constructed from wood, but they may be made'et iron or steel, if desired. A metal bar is located on 4eaeh side ofthe levers and vhave their ends pivotally connected `to the latter Thepivots 11 may be located the levers but Vare preferablynearer tothelarger ends 12 Ythan to the Smaller ends 13.

A guide block 14 is located between' the transverse bars 10 and issecured `to the latter bymeans of rivets 15. This' guidev block isspaced equidistantly from the pivots 11 and is provided with anopeningl.- Anut 17 has pivotallyattached to its oppositesldes two pairsof links 18 whose other ends aref attached to the ends 12 of levers bymeans of pivots 19. A tubular member 20 has a "if desired.: i Y .n

Fastened to the ends, 13 by means of screws, 'Y i tain 'the'liatsurfaces 27; apart different distances.y Theheads of' the screws`24Lare. countersunk'inthefinner surtacejof the jawsand the opening throughvwliichutlie screw passes is larger than .the i j .screw` so as vtopermit the jaws to rock.. Y

The llinks 18fa`reso long thaty they can` takenv on line-Q i y I member2O V1s turned so( as to moveinward- 1927. serial No'. islbss.' l

or other, [equivalent means for rotating the v y t .60 vtubular member20 at its louter end. The inner en dof'member 2O is f normally in con-Y' tactl yv1t'l1..o neA side ofthe guide rblock 14 and vhas beenlshown'as` provided fwith a steell ferrule 23 which,` 'however, may beomittedy Mare clamping jaws'25, The ends 13 have va convexinner surface26 that. cooperates with. av Corresp ending concavev surface on the jaws(Figs-1 and') sothatfthe jaws may thereby main# rockto alimitedextentand A parallel rwh en spaced notbe brought into astraightline but willalways inclinedto lthe Vsame side as shown in Fig". A1. It' is obviousthat if the tubular ly andkaganstftlie; guide member 14,v that y' thiswill* produce a force vthat willmove the 'Y nut 17towards theright'('FijgL 1)l therebyvr vided with a threaded section`29 with whichthe threads the rod 31 isrotated, it will move axially either towards oraway from the jaws 25, Y

depending on the direction of rotation.

Let us now'assu'me that-the job involves f `the problem .of securingmember 35 tomember 2e by glue; Member '2s-1S ma of au clamped betweenjaws 25 by rotating tubular member 20 so as to straighten' the toggle,

lVhen i no l part 35 is then put into position and rody i 31L rotated soas to engage member 35 and force it against part 28. It will be observedthat this vclamping device comprises bei" and that it: has lnoconnectionwithv "member le which merely serves as a guide forrod 3l and as anabutment `for rod 20.

a pair ofspacedjaws and means for moving them vtowards and away fromeach other soi as to clamp and rele-ase an object andan f independentclamping membermovable in a direction at right angles to the lmovementof the jaws.

In Figs. G and 7 I have illustrated a slightly modified'ormpt*construction in` which the jaws 25 have been replaced by jaws 36which areV shaped somewhat as shownin F102' 6.l These' jaws instead Vofbeing secured to the levers 8 'and 9 by means of screws are each heldinplace by vtwo round plates '36, each of which isideiitical with'theothers and are provided withdiametricallylocated openings for theyrecept-ion of the pivot/pins 38. 'Vhcn the clamp is applied to anyarticle for `the purpose oit' securing the `clamp toit, the jaws 36 areso arrangedv that the pins? 3 8 which pass through the jaws are to Ybeinside'oifthe corresponding pinsl in ends 13. Vh'en rod lis operatedsoas to produce a vforce tendingto move the clamped inember outwardly vthereV is a tendency to move jaws 36 to the dot and dashpositi'on shownin Fig. 6i Any Y movement outwardly of jaws 36 Vproduces a toggleeffectthat increases the clamping force.'`

Attention is 'called to the fact rod l is threadedly engaged wit-'lithetubular mem- As a result of this construction the force exerted by rod3l is added'to the lforce exerted bythe tubular member 20 for thev 31had a threaded connection withl block 14:

instead of with the tubular member,` the force exerted by it wouldnothave any yei'l'ect upon. the clamping action of the toggles.

From the above it will be apparent that I have produced a clampingdevicewhich can be quickly secured to an article and which is alsoprovided `with a clamping member. that moves in a direction at rightfanglesto the other clamping members.

Having described my invention what I claim as new is: Y j

l. A device of the class described com- Yp'risingyin-combination, a pairof-spaced levers, a connecting device pivotally connected witlr thelevers intermediate their ends; -a clamping jaw secured t0 one end ofeach oi' said levers Ybynieans of two links each ofwhichfhas one endpivoted to the lever and the other end pivoted to the jaw,

a toggle Vmechanism connecting the other ends of said levers,` means forchanging the angularity of said toggle, saidf last named meanscomprising a tubular screw having a threaded connection with the toggledevice and having one end inV engagement with the Connecting device, aclamping member Vcomprising arod passing` through the tubular screw,said rod havinga threaded connec-I tion with the interior of the tubularscrew and means'for rotating said rod;

.2. A'clampfof the class specified comprising, in combination, a pair ofspaced 'levers lying in the same plane, a connecting device pivotallyconnected withl each of said levers at aupoint intermediate its ends, aclamping jaw mov-ably connected to the adjacent end of each lever bymeans of :two links each of which Vhasone end pivoted 5to the lever'andthe `.other end pivotedtothe :jaw,'a toggle mechanism pivotallyconnected to the other ends of said levers, said toggle mechainsmcomprising a nut'and ytwo, pair oi toggle links, a hollow tubular memberthreadedly Y connected with said nut, means connected to t-he outer endof said tubular member for rotating the same, the wallet the opening in.the threaded member having a threaded section, a rod 'extendingthroughthe tubular member and thieadedly vconnected therewith and means :torrotating the rod.y

' In testimony whereof I afhx my signature.

ioARL i. Yonne. c

